Topgunz full supercharger kits!!

redondoaveb · 07-13-2018, 08:45 PM

Quote:

Originally Posted by G3RSTY7

Thanks i waa going to order the spacers but thanks for the reminder would be a bummer forgetting that. Surprised you didn’t go for the 3.15” except for possible tension issues as the belt stretches.

Larger pulley on jackshaft equals more boost. The 3.15 is only a fraction smaller and the 3.25 is only a fraction bigger but I wanted to error on the bigger side.

G3RSTY7 · 07-13-2018, 09:12 PM

Quote:

Originally Posted by redondoaveb

Larger pulley on jackshaft equals more boost. The 3.15 is only a fraction smaller and the 3.25 is only a fraction bigger but I wanted to error on the bigger side.

Has to be the opposite, less input RPMs. The other 8-rib opposite of the serp belt SC pulley would get more boost by being bigger. But less belt slip at least with 3.25”. I assume that 3.20” is special order?

redondoaveb · 07-14-2018, 12:03 AM

Quote:

Originally Posted by G3RSTY7

Has to be the opposite, less input RPMs. The other 8-rib opposite of the serp belt SC pulley would get more boost by being bigger. But less belt slip at least with 3.25”. I assume that 3.20” is special order?

I believe it's just the opposite. The 9lb (2.75) pulley which is the jackshaft pulley on the serpentine side is smaller than the 8lb (3.12) pulley. If you look at the signature of "stillenz84", post at the top of the page, he's running a 9lb (which would be the jackshaft on the serpentine side), a 2.85 sc pulley and a 3.47 jackshaft (that would have to be the jackshaft on the supercharger side). That's how I read it anyway, I could be wrong.

Topgunz - air to air upgrade

Getting back to the 3.20. I called Stillen and they tried telling me it was a vortech pulley. You can tell by the design of it that it looks nothing like a vortech pulley. It looks more to me like a magnuson pulley.

After reading your post again, the jackshaft pulley I was talking about is the one on the sc side (opposite the serpentine side jackshaft pulley). That's the one I'm replacing with a high traction. My serpentine side doesn't have any belt slip.

G3RSTY7 · 07-14-2018, 09:23 AM

Quote:

Originally Posted by redondoaveb

I believe it's just the opposite. The 9lb (2.75) pulley which is the jackshaft pulley on the serpentine side is smaller than the 8lb (3.12) pulley. If you look at the signature of "stillenz84", post at the top of the page, he's running a 9lb (which would be the jackshaft on the serpentine side), a 2.85 sc pulley and a 3.47 jackshaft (that would have to be the jackshaft on the supercharger side). That's how I read it anyway, I could be wrong.

Topgunz - air to air upgrade

Getting back to the 3.20. I called Stillen and they tried telling me it was a vortech pulley. You can tell by the design of it that it looks nothing like a vortech pulley. It looks more to me like a magnuson pulley.

After reading your post again, the jackshaft pulley I was talking about is the one on the sc side (opposite the serpentine side jackshaft pulley). That's the one I'm replacing with a high traction. My serpentine side doesn't have any belt slip.

Yea I’m talking about the SC input pulley being smaller. Serpentine side jackshaft you want smaller for more boost (so 2.75” for 9lb vs the 3something” 8lb), bigger on blower side jackshaft (his is 3.47) and then small on actual input shaft (i guess he’s made 2.85” somehow work). Don’t try to duplicate his numbers though he’s pushing like 17psi on a built block. It amazes me that you’re pushing 586whp on 12psi and he’s barely to 700whp at 17psi. You’re sea level maybe Oklahoma is a couple thousand feet but still, crazy! He must have the sur-grip on his 2.85” though that sounds like it would be slip city otherwise I don’t know why more people would put on a smaller serp side jackshaft pulley with bigger idler pulley to take up slack when they could just replace the SC input pulley with a really small one. Guess i’ll order the 3.15 and go from there

redondoaveb · 07-14-2018, 11:06 AM

Quote:

Originally Posted by G3RSTY7

Yea I’m talking about the SC input pulley being smaller. Serpentine side jackshaft you want smaller for more boost (so 2.75” for 9lb vs the 3something” 8lb), bigger on blower side jackshaft (his is 3.47) and then small on actual input shaft (i guess he’s made 2.85” somehow work). Don’t try to duplicate his numbers though he’s pushing like 17psi on a built block. It amazes me that you’re pushing 586whp on 12psi and he’s barely to 700whp at 17psi. You’re sea level maybe Oklahoma is a couple thousand feet but still, crazy! He must have the sur-grip on his 2.85” though that sounds like it would be slip city otherwise I don’t know why more people would put on a smaller serp side jackshaft pulley with bigger idler pulley to take up slack when they could just replace the SC input pulley with a really small one. Guess i’ll order the 3.15 and go from there

Sounds like we're on the same page. I have a 3.47 jackshaft sc side that I sent into 928 for their sur-grip coating. When my car goes back into Seb I'll have him install it to see what psi it gives me. I don't want to duplicate what Evan has done but I would like to see a couple more psi. I'm not too concerned about too much boost as if one of the things we're going to try works then I'll be able to dump excess boost which I'll need to do when I switch to my 91 tune.

cupcakez · 11-09-2018, 06:08 PM

Quote:

Originally Posted by redondoaveb

I believe it's just the opposite. The 9lb (2.75) pulley which is the jackshaft pulley on the serpentine side is smaller than the 8lb (3.12) pulley. If you look at the signature of "stillenz84", post at the top of the page, he's running a 9lb (which would be the jackshaft on the serpentine side), a 2.85 sc pulley and a 3.47 jackshaft (that would have to be the jackshaft on the supercharger side). That's how I read it anyway, I could be wrong.

Topgunz - air to air upgrade

Getting back to the 3.20. I called Stillen and they tried telling me it was a vortech pulley. You can tell by the design of it that it looks nothing like a vortech pulley. It looks more to me like a magnuson pulley.

After reading your post again, the jackshaft pulley I was talking about is the one on the sc side (opposite the serpentine side jackshaft pulley). That's the one I'm replacing with a high traction. My serpentine side doesn't have any belt slip.

When I measured my 9psi pulley I bought form ConceptZ, it came out to be 2.87" instead of 2.75"?
Where do you guys get this 2.75" 9psi pulley from that goes on the jackshaft serpentine side?

Also.

I see 928 offers the sur-grip for their pulleys but has anyone actually tried it for a DD?
I would assume it makes belt dust since it would eat up your belt making the belt's life span shorter in the long run no?
Yeah they claim to make your pulleys life last longer but probably at the cost of the belt I'd assume?
Or does it not make much of any dust over time?

redondoaveb · 11-09-2018, 07:34 PM

Quote:

Originally Posted by cupcakez

When I measured my 9psi pulley I bought form ConceptZ, it came out to be 2.87" instead of 2.75"?
Where do you guys get this 2.75" 9psi pulley from that goes on the jackshaft serpentine side?

Also.

I see 928 offers the sur-grip for their pulleys but has anyone actually tried it for a DD?
I would assume it makes belt dust since it would eat up your belt making the belt's life span shorter in the long run no?
Yeah they claim to make your pulleys life last longer but probably at the cost of the belt I'd assume?
Or does it not make much of any dust over time?

The 9lb pulley is a 2.87

Your second question I answered in the PM you sent me. Other's might want to comment on their experience with them.

cupcakez · 11-09-2018, 07:56 PM

Quote:

Originally Posted by redondoaveb

The 9lb pulley is a 2.87

Your second question I answered in the PM you sent me. Other's might want to comment on their experience with them.

Thanks.

Just wasn't sure cause I saw evan's post say his was like 2.75 or something and I am pretty sure I saw another post saying it was less than 2.87 lol

redondoaveb · 11-09-2018, 08:12 PM

Quote:

Originally Posted by cupcakez

Thanks.

Just wasn't sure cause I saw evan's post say his was like 2.75 or something and I am pretty sure I saw another post saying it was less than 2.87 lol

Just stay with the 2.87.

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